Radiation from the Sun reaches the Earth (above the atmosphere) at a rate of about 1350 W/m2. Assume that this is a single EM wave and calculate the maximum value of the electric field.

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Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

An object in mechanical equilibrium is an object